We have concluded testing of the 5 BC/BT corrector magnets.
The results are as follows: 2 of the 5 corrector magnets
passed resistance, voltage, hipot testing and have normal
core field readings of ~525 Gauss @3.5A. We will leave these
2 alone. They are listed below.
The other 3 failed. We have 2 BC corrector magnets ready to
go now. And, our putting a BT together. We should have all 3
ready by tomorrow.
The plan is as follows take the 3 good magnets down to
tunnel for installation, after removal of broken magnets.
Here is what we accomplished this morning...
1) Pre work briefing with Keith, Omar, Robert NortonLT and I
to discuss our plan of attack .
2) We powered down the CAMAC crates and removed the old
serial highway cables. These removed cables were returned to
the TED for inspection by Omar and Keith.
3) We installed the replacement serial highway cables,
repowered the CAMAC Crates and rebooted the VME crate to
make sure they worked properly. The CAMAC Crates came out of
bypass as they should and started scanning.
Preformed signal injections across the BPM downconverters for IPM2C21A and IPM2C24A, IPM2H01 is currently out of the beamline. RF signal was injected into the test port heliax located in the rack and IF readings were taken via a scope (Vpk-pk) before the signal enters the lockin amp.
IPM2C24X -> RF in 0 dBm IF out 22mV
IPM2C24Y -> RF in 0 dBm IF out 34 mV
IPM2C24I -> RF in -20 dBm IF out 13.6mV
IPM2C21X -> RF in -10 dbm IF out 24mV
IPM2C21Y -> RF in -10 dBm IF out 13mV
IPM2C21I -> RF in -30 dBm IF out 8mV
Stripline BPMs and Cavity BPMs on the Hall D line do not have conventional BPM alarm status screens as the 4 channel/SEE BPMs do. (See Fig. 1-3)
May we add the DR Expert controls for the Striplines (Fig. 4) and Cavity BPMs (Fig. 5) in lieu of these to the BPM spike screens as they provide status and error reporting on their bottom left hand side as well as a screen ('Status' button, Fig. 6) which may be drilled down on for further information on the issues. Macro calls for these screens can be stolen from the DR Diagnostics BPM screen pictured in Fig. 7 if necessary.